X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=configure.ac;h=f6aca78ee80733ad211f4bea255a16f34d164e1f;hb=2fe261e59aa7ae4b250145107f8ca2af7289be18;hp=0627bf2f74f7455594fdd1c18f3a93638d780861;hpb=7d335e21a888a3b74aed9bf6d03229a5db48eba7;p=supertux.git

diff --git a/configure.ac b/configure.ac
index 0627bf2f7..f6aca78ee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -154,9 +154,15 @@ NP_FINDLIB([OPENAL], [OpenAL], [OpenAL],
          [AC_MSG_ERROR([Please intall OpenAL])],
          [], [])
 
-AX_CHECK_GL
-if test "$no_gl" = "yes"; then
-  AC_MSG_ERROR([Please install opengl libraries and headers])
+AC_ARG_ENABLE(opengl,
+              AC_HELP_STRING([--enable-opengl], [enable opengl support]),
+              [enable_opengl=$enableval], [enable_opengl=yes])
+
+if test "$enable_opengl" = "yes"; then
+  AX_CHECK_GL
+  if test "$no_gl" != "yes"; then
+    AC_DEFINE_UNQUOTED(HAVE_OPENGL, 1, Define if OpenGL is present on the system)
+  fi
 fi
 
 dnl Checks for library functions.